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(No Model.)

R. H. DIXON.

EITMAN ROD OONNEGTION FOR MUWERS AND REAPEM.` No. 344,084. Patented June 22,1886.

Unirse raras ROBERT H. DIXON,

Parana erica.

OF CHICAGO, ILLINOIS, ASSIGNOR TO WILLIAM DEER- ING St CO., OF SAME PLACE.

PlTlVlAN-ROD CONNECTION FOR VIOWERS AND REPERS.

SPECIFICATION forming part of Letters Patent No. '3d-4,034, dated June 22, 1886.

Application filed January 23, 1886. Serial No. 189,494.

To aZZ whom it may concern.-

Beit known that I, ROBERT H. DIXON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pitman-Rod Connections for Mowers and Rea-pers, which are fully described in the following specification.

The purpose of this invention is to provide a new and more simple and easily-constructed joint than has heretofore been used for connecting the pitmau-rod to the cutter-bar and to the crank-wrist of a mower in such mauner as to permit the movement of the cutter- I 5 bar into the different positions which are necessary in tilting, traveling over uneven ground, and in folding it up to pass gateways, and which will also permit the removal of the entire sickle by disconnecting such joint with- 2O out withdrawing any bolts or other fastenings or locking devices. It is of the nature of a balland-socket joint having certain peculiarities of structure, which lare hereinafter eX- plained, and which appear fully in the drawings, in which- Figure l is a perspective of the shoe,wrist wheel, pitman, and sickle of a mower having my said improvement. Fig. 2 is a front elevation of my improved joint, the cutter-bar being folded up in position to be removed. Fig. 3 shows in elevation the same parts as y Fig. 2, but detached by turning the pitmanstirrup down toward the observer. Fig. 4 is a front elevation of a similar jointat the crankwrist. Fig. 5 is a section through xx, Fig. 2, except that the sickle and ball are shown in plan, and as seen when the sickle is down horizontal. Fig. 6 is aplan of the wrist-wheel and pitman-joint thereat, the pitmanconncc- 4o tion being shown as a section through y y,

Fig. 4.

A is the mower-frame. A is the shoe. is the finger-bar. B is the wrist-wheel. C is the cutter-bar. D is the pitman-rod. D is 4 5 the stirrup at the wrist-wheel. D2 is the stirrup at the cutter-bar.

The two stirrups are alike, with the exception of a single feature, which will be pointed out. They are both in form spherical shells.

5C The stirrup D2 consists of the tubular shank (No model.)

D20, interiorly screw-threaded to receive the rod D and the globe D2". Said globe has the cylindrical boss D21, parallel with the shank D20, and is rifted diametrically transversely to said cylindrical boss, said rift d22 extending 55 almost through the shell, but leaving the two hemispheres j oined by the neck d2, opposite the cylindrical boss D21. The interior spherical cavity, d, opens to the surface of the globe at the rear by the opening (Z210, the shape of which is that of a circle having two equal segments cut off from opposite sides by parallel chords d d. It may also have the circular opening c1210 at the front. Through the cylindrical boss D210 the clamp-bolt E is passed, and provided with the lock-nut @,to clamp the two wings of the rifted globe together when necessary to take up any lost motion in the joint.

The cutter-bar' C has the lug C projecting from its upper surface, and from said lug there 7o is protruded forward a stud terminating in the ball C2. This ball fits the spherical cavity d2l of the globe D21, and is truncated by the removal of two equal and opposite segments, thus giving it two parallel plane faces, c2 c2, and adapting it to enter the spherical cavity d21 through the opening (Z210 when placed in such position Jthat its parallel faces c2 c2 coincide in direction with the parallel edges d d. The faces c2 c2 are preferably slightly oblique to the direction of the length of cutterbar, but are substantially parallel to the axis of its pivot to the shoe. The direction of such Obliquity should be such that the cutter-bar shall lean outward from a vertical line when the faces c2 c2 are in'position to allow the ball C2 to enter the cavity du. Obviously the same result may be attained by locating the opening i210 with its parallel edges d d oblique to the direction of the pitman-rod.

The mode of connecting and disconnecting the parts of this joint will be obvious from inspection of Figs. 2 and 3. The nger-bar carrying the cutter-bar being folded up into the position shown in those figures, the stirrup D2 95 may be placed upon the ball-stud C2 by inserting the lower spherical side of the latter through the opening Z210 in the former and turning the stirrupdas its screw-connection with the rod D will allow-about the axial roo line of said rod untilthe entire surface of the plane faces c2 c2 is Within the spherical cavity d, and then lowering the cutter-bar by rockf if ing the nger-bar on'its pivot to the shoe,

The joint of the Wrist-wheel B is differentI from that already described in that the ball kF-sirnilar in forni to the ball (l2-is formed on the thimble or sleeve F, which is the journal-box for the wrist G, and is prevented from` turning in the stirrup D about the axis of said sleeve and wrist by the fact that the clamp-bolt E', which passes through the boss D, enters and traverses the spherical cavity 2o d at that side on which the boss Dl1 is located, so forming a key engaging one of the fiat faces, f, of the ball F. To disconnect thisjoint, the clamp-bolt E must be removed and the thimble or sleeve F rolled on the Wrist-pin G until the parallel faces f of the ball F coincide with the parallel edges of the opening dm, and at that stage, the pitman being given an axial turn of ninety degrees, the joint will be dis'- connected, the action being precisely similar 3o to that of the other joint, the rolling of the thimble being the equivalent of swinging up the cutter-bar, and so rolling the ball C2,fixed to it.

I do not claim the use of the clamp bolt E as a key to engage the fiat surface of ball F and prevent its rotation; nor do I claim the use of the truncated head of said bolt E', (shown in A Fig. 2) as adapted to engage the shank of the stirrup D and prevent accidental rotation and 4o escape of said bolt. The said features are not my invention, but are claimed by John F. Steward in his pending application, filed. January 8, 1886, Serial No. 187,973.

1. In combination with a stirrup having a cavity which is circular about an axial line and having an axial opening into such cavity, said opening being i'ncompletely circular about the axis of the cavity, the reciprocating bar having a sideward-jutting stud provided with a pivot of which the cross-section has the form of the axial opening into the stirrup-cavity, substantially as set forth.

2. In combination with the stirrup having its pivotcavity provided with an opening thereinto in the form of a segment of 'a circle, the cutter-bar having a sideWard-jutting stud provided with aball-pivot truncated bya plane parallel to its axis,to fit the segmental opening in the stirrup-cavity,substantially as set forth.

3. In combination, substantially as set forth, the Wrist G, the thimlolel F, having the ballswell F cut away to form a key-seat, the stirrup having the spherical cavity to receive the ball, and an opening thereinto conformed in outline to the mutilated circular outline of the ball, and the removable key-bolt E', intrnding into the spherical cavity ofthe stirrup in the locality ot' the key-seat on the ball when the latter is in working position, the outline of said opening being not coincident with the outline of the ball in working position.

In testimony whereof I have hereunto set niy hand, in the presence of two witnesses, at Ghicago, Illinois, this 19th day of January, A. D. 75 1886.

ROBERT H. DIXON.

Attest.:

WM. D. PORTER, J oHN B. IAsPARI. 

